Package Contents Set of 4 bias binding devices 6 mm, 12 mm, 18 mm and 25 mm, good quality, strong and durable, which is best sewn. Advantage The bias binding sewing makes your sewing easier, for the fabric is stretchy and works more easily when sewing curves and angles. Wide Application With this sewing bias accessory, which allows you to place your rounded bias strip without the fabric creasing, suitable for making a bracelet to glue the fabric, and other DIY projects. MaterialThis bias tape is made of high quality plastic material, Ergonomic design, no harm to your hand. How to useHere is how to use it and for details, please see picture 2.1. Fold the top of the fabric strip 45 and pass through the bias binding devices. Use an awl to help pass through. 2. Extract the fabric strip, keeping both sides of the fabric strip symmetrical, then iron it with an iron.